Machine for fastening reeds without rivets on the sound plates of reed instruments



May 31, 1932. M. WEIDLICH 1 1,860,758

MACHINE FOR FASTENING REEDS WITHUUT RIVETS ON SOUND PLATES OF REED INSTRUMENTS Filed July 28, 1950 Patented May 31, 1932 UNITED T T S,

PATENT OFFICE MAX WEIDLICH,-OF GEOBGENTH AL, NEAR KLINGENTHAL, GERMANY rmacnmn FORFASTENING BEED'S WITHO UT 'aIvErs ON THE sounn Prawns or REED INSTRUMENTS 7 Application filed July 28, 1930, Serial N0. 471,379, and in Poland .Tuly' 27 1929.

This invention relates to a machine for fastening reeds on the sound plates of reed instruments such as accordions without rivets.

, Devicesare already known which press the 5 material of the sound plates through the reeds by means of a die. It is further known, to

arrange reed moulds on a carriage and to move this carriage backwards and forwards.

These devices have however not proved satis- 10 factory in practice, because the desired object could not be attained in a technically perfect manner. It is preferable that the carriage,

for accommodating the reeds and sound plates, be situated, in its initial position, outside the machine to enable easy insertion.

This invention consists in that the sliding carriage carries a series of centre punches besides the reed moulds and is connected with an actuating lever by means of a disengageable clutch, which lever also carries the die provided with rams, whereas a stripper strips off the finished sound plates. e

The punching of the material and the riveting is preferably effected in two operations, 25 as otherwise the material pressed out of the reeds comes between the rivet die or the riveter. The punching must be carried out in the first operation and the riveting in the second operation. v

As the reeds are only slightly narrower than the slots in the sound plate but must nevertheless oscillate freely, the points of the centre punches, the rams in the die as also the reed moulds of the machine are accurately adjustable Moreover the machine is locked by abutment pins in such a manner, that the punching and riveting is only effected when these pins engage in guide holes.

An embodiment of the invention is illustrated by way of example in the accompanying drawings in which Fig. 1 shows the machine partly in section.

Fig. 2 is a front elevation.

Fig. 3 shows'a die in elevation.

. Fig. 4 is a top plan view of the die.

Fig. 5 shows a slide in side elevation.

Fig. 6 is a top'plan view of the slide.

A guide 2 for a carriage 3 is provided on a base frame 1. A die 4 is guided in a guide,

'5 of the machine frame 6. The ca-rriage 3 square section part fixed on the bolt 11 is for this-purpose mounted in a guide, whereas the bolt 11 works in'aslot. In operation, therefore, the square section part moves backwards and forwards together withthe pin in order to obtain an absolutely vertical movement of the die. f I p The carriage 3 carries moulds 12 for inserting the reeds, which are fixable in any desired position by clamps 13 and screws 14. The carriage 3 is provided with a bore 15. to en able the material punched outof the reeds to drop out. A series of centre punches 16, which being inserted in suitable bushes in the carriage and eccentrically ground,serves for pressing'apa'rt the material pressed through the reeds by the sound plates. 7 The stroke of this carriage is limited on each side by one or more abutment screws 17, 18.

The centre punch 16'functions' in the second operation and serves for expanding the material depressed from the sound plate by the reed, a'small plate being punched from and "dropping out of'the reed itself. The eccentricity enables an adjustment of the-individual punches in order to obtain an accurat adjustment to the middle ram 24.

V The die 4 carries a stripper plate 19 mounted on bolts 20, 21 and cushioned by springs 22, 23. The rams 24 are also arranged I in ram parts 25 in the die 4. Therams are adjustable in known manner by screws 26;

The lever 9 carries a head part r8,which is remaining in its forward position.

detachably connected with the sliding carriage 3 by a clutch provided with a bolt 27 and a spring 28. A spring 30 holds the clutch element 7 permanently in horizontal position.

The spring 28 efiects a pressing together of the two clutch arms which are linked in the bolts of the clutch element 7 rotatable on the carriage 3. The rams 24 press the material of the sound plate through the reeds and at the same time punch the reed. The riveting is theneflected in the second'operation of the machine by the set of centre punches.

To ensure that when in operative position the rams 24 in the die 4 lie exactly above the centre of the reed heads and concentric below the punched out material, an adjusting pin 31 is arranged below the die '1, which pin must engage in corresponding holes 32, 33 of the carriage in each working position. If the carriage should not travel right up to the abutment screws 17, 18, the inclined point of the pin 31 always presses the carriage into the properv working position. 7

An abutment pin 34 is also provided on the carriage in order to prevent the die 4, at the pressing down, from riveting too far the sound plate sitting on the die and chiefly to take the thickness of the sound plate into consideration. The pin 34 can be easily exchanged for a higher or lower pin when making a sound plate.

The operation of the machine with two working operations is as follows V Fig. 1 illustrates the initial position, the die 4 being in the upper and the carriage 3 in the extreme front position, to enable the reeds to be easily inserted in the mould 12. After inserting the reeds, the carriage is moved towards the rear by the lever 9 through the clutch elements 7 and 8. At the same time the die 4 is moved downwards, the carriage 3 running up to the abutment 18. The clutch elements 7 and 8 disengage whereas the lever 9 continues to move the, die 4downwards. There is a, certain resiliency in the arms of the element7 which is made solid. The part 29 is loosely conn'ected to the part 7. The part 29 first pulls back the clutch element 7 with the carriage, the dielbeing at the same time moved downwards. The carriage runs up to the stop 18. As the lever 9 continues to move towards the rear, the clutch 78 is disengaged and the'die movedfurther towards the rear. This is followed by the expanding of the material and thepressing back of the lever 9. However the clutch element 8 bears on the outer side against the clutch element 7 and presses the slide 7 back into its initial position. The outer clutch element 8 is then movedfurther towards the rear, the carriage In this position of the carriage, the set of centre punches lies over the rams, so thatthe riveting can be carried out. i

The rams 24 in the die 4 then press the material of the sound plate 35 through the reeds which are situated under the sound plate in the reed mould 12. The material punched out falls through the bores 16. After punching the die 4 again rises and lifts the sound plate 35 sitting on the rams 24 with the reeds. The carriage pushed back into the initial position by the clutch element 8, which is situated outside the element 7, so that the carriage bears against the abutment 17, and then the lever 9 is moved back with the clutch element 8, which is still situated outside the clutch part 7 Thus the carriage 3 remains against the abutment 17 and the die descends 'with the adhering sound plate onto the series of centre punches now situated under the rams 24. The height of the abutment 34 determines the extent of the centre punching with the different thicknesses of material. The pin 31 serves for bringing now the bores 15 and then the series of centre punches 16 exactly under the die during the punching of the material and centre punching, in that in the first instance it engages in the cavity 32 and in the second instance in the cavity 33.

The lever 9 is then returned into its initial position. The clutch element 8 is thus again engaged in the element 7. The die consequently rises, and a pin 36, provided with a nose 37 presses against the head 38 of the bolts 20 and 21, so that the stripper 19 strips 013? the finished sound plate.

The operation repeats itself in the manner described.

1. A machine for fastening .the reeds of reed instruments such as accordions by punching and riveting material out of the sound plates and reeds, comprising in combination a sliding carriage, reed moulds 'mounted on said sliding carriage, a series of centre punches mounted on said carriage, a lever, a disengageable clutch adapted to connect said carriage with said lever, a die adapted to be moved up and down by said lever, rams on said die, anose, and a stripper adapted to strip oil the finished sound plates on said nose during the upward movement of said die, said carriage adapted during its reciprocating movement to first bring said moulds in line with said rams and then to position the assembled reeds and plates over said centre punches.

2. A machine as specified in claim 1, comprising in combination with the moulds for the reeds, means for individually adjusting said moulds, and bows adapted to fix said 

